.dialog_box{
  position: fixed;
  z-index: 100;
  width: 100%;
  height: 100%;
  top:0;
  left: 0;
  background: rgba(0,0,0,0.5);
  .box{
    width: 600px;
    margin: 50px auto;
    background: #fff;
    text-align: center;
    main{
      border: 1px solid #ccc;
    }
  }
}